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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Chelone

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1 Leaves sessile or nearly so, the petioles 0-3 mm long; flowers distinctly 4-ranked; staminodes with purple tips; corolla purple
1 Leaves petiolate, the petioles 2-40 mm long; flowers less distinctly 4-ranked; staminodes with white, green, or pinkish tips; corolla purple or white.
  2 Petioles (2-) 10-40 mm long; leaf blade rounded or truncate at the base; leaf blades averaging ca. 2× as long as wide, 4-8 cm wide; staminodes with white to light pink tips; corolla purple; inflorescence bracts 2-7 mm long
  2 Petioles 1-15 mm long; leaf blade cuneate at the base; staminodium white or green; leaf blades averaging 3× (or more) as long as wide, 1-6 cm wide; corolla purple or white; inflorescence bracts 4-23 mm long.
    3 Corolla white (or tinged with purple, pink, or green near the mouth); staminodes with green tips; palate white-bearded (rarely greenish-yellow-bearded)
    3 Corolla pink or purple throughout; staminodes with white tips (rarely with green or purple tips); palate yellow-bearded (rarely white-bearded).
      4 Staminodes 4-8 (-12) mm long; calyx lobes densely ciliate; [KY westward]
      4 Staminodes (6-) 8-12 (-14) mm long; calyx lobes glabrous or sparsely ciliate; [more widespread in our area].
        5 Lower corolla lobes 12-15 (-16) mm long; mid-cauline leaves (6-) 8-20 cm long; [Southern Appalachians]
        5 Lower corolla lobes (12-) 15-19 mm long; mid-cauline leaves 5.3-8 (-12) cm long; [mainly Coastal Plain]
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